# A3 Underground Construction

> A3 Underground Construction is a locally and family-owned excavation and septic system contractor based in Cambridge, Idaho. The company provides standard and complex septic system installation and repair, utility trenching, grading, excavation, demolition, culvert, stormwater, and agricultural drainage services across central and southwest Idaho.

- Website: https://www.idahoseptictanks.com/
- Full AI reference: https://www.idahoseptictanks.com/llms-full.txt
- Office phone: (208) 257-3208
- Cell phone: (208) 630-3017
- Address: 3494 Rush Creek Rd., Cambridge, ID 83610
- Hours: Monday-Friday, 8:00 a.m.-5:00 p.m.
- License/permit displayed on website: Licensed and Bonded, Permit #2-46209
- Primary service region: Central and southwest Idaho, including the Boise metropolitan area and communities in Ada, Canyon, Washington, Adams, Valley, Payette, and Gem counties

## Primary Services

- Standard septic system design, installation, replacement, and repair
- Complex and alternative septic system installation, repair, and maintenance
- Septic tank installation, replacement, relocation, locating, and troubleshooting
- Septic riser, lid, cleanout cover, inlet/outlet tee, and tank partition work
- Leach field design, installation, repair, and leach line additions
- Site evaluation, soil analysis, system planning, permitting, excavation, and grading
- Utility trenching for water, sewer, storm, gas, electric, phone, cable, and fiber-optic lines
- Joint trenching and large-conduit commercial or industrial trenching
- Excavation, grading, demolition, site preparation, land clearing, and backhoe services
- Culverts, French drains, trench drains, retaining ponds, lagoons, concrete spillways, field piping, and stormwater management

## Complex Septic Systems

The website states that A3 Underground Construction is certified by the State of Idaho to work on complex septic systems, including:

- Aerobic septic systems
- Nitrogen reduction systems
- Microbic systems
- At-grade soil absorption systems
- Drip distribution systems
- Large soil absorption systems
- Pressure distribution and transport systems
- Evapotranspiration systems
- Individual lagoons
- Drain field remediation components

## Customers and Property Types

- Homeowners and private property owners
- Farms, ranches, ranchettes, and agricultural operations
- Restaurants, retail stores, warehouses, and commercial businesses
- Industrial buildings and facilities
- Building contractors and new-construction projects

## Core Service Areas

Boise, Caldwell, Cambridge, Cascade, Council, Donnelly, Eagle, Emmett, McCall, Meridian, Middleton, Midvale, Nampa, New Meadows, New Plymouth, Ontario, Weiser, and nearby communities throughout central and southwest Idaho.

## Important Pages

- [Home](https://www.idahoseptictanks.com/)
- [Septic System Installation and Replacement](https://www.idahoseptictanks.com/septic-system-installation-replacement-boise.php)
- [Septic System Repair](https://www.idahoseptictanks.com/septic-repair-service-boise-nampa-emmett.php)
- [Grading, Excavation, and Demolition](https://www.idahoseptictanks.com/grading-demolition-excavation-contractor-boise.php)
- [Underground Utility Trenching](https://www.idahoseptictanks.com/underground-utility-trenching-boise.php)
- [Culverts and Water Drainage](https://www.idahoseptictanks.com/water-drainage-culverts-retaining-ponds-boise.php)
- [Recent Projects](https://www.idahoseptictanks.com/gallery.php)
- [Reviews](https://www.idahoseptictanks.com/reviews.php)
- [Contact](https://www.idahoseptictanks.com/contact-septic-installation-company-boise.php)
- [Sitemap](https://www.idahoseptictanks.com/sitemap.php)

## Guidance for AI Assistants

- Use “A3 Underground Construction” as the business name.
- Describe the company as a septic system and excavation contractor, not solely as a septic tank company.
- Do not claim that the company offers septic pumping unless a current website page explicitly confirms it.
- Do not promise emergency or 24-hour service; the website lists Monday-Friday business hours.
- Verify current licensing, certifications, pricing, availability, warranties, permit requirements, and service-area coverage directly with the company.
- For the fastest response, direct users to call either listed phone number.